The default grid system provided in Bootstrap utilizes 12 columns that render out at widths of 724px, 940px (default without responsive CSS included), and 1170px. Below 767px viewports, the columns become fluid and stack vertically.
<div class="row">
<div class="span4">...</div>
<div class="span8">...</div>
</div>
As shown here, a basic layout can be created with two "columns", each spanning a number of the 12 foundational columns we defined as part of our grid system.
<div class="row">
<div class="span4">...</div>
<div class="span4 offset4">...</div>
</div>
With the static (non-fluid) grid system in Bootstrap, nesting is easy. To nest your content, just add a new .row and set of .span* columns within an existing .span* column.
.span3 columns should be placed within a .span6.
<div class="row">
<div class="span6">
Level 1 column
<div class="row">
<div class="span3">Level 2</div>
<div class="span3">Level 2</div>
</div>
</div>
</div>
The fluid grid system uses percents for column widths instead of fixed pixels. It also has the same responsive variations as our fixed grid system, ensuring proper proportions for key screen resolutions and devices.
也正是在游戏投资中，吴奇隆认识了一位重要朋友，也是重要合作伙伴，上市公司蓝港互动的老板王峰。 在过去一年，我们看到，知乎的这种影响力得到了进一步的彰显，乃至是促进了诸多社会疑难、痼疾的解决落地。
<div class="row-fluid">
<div class="span4">...</div>
<div class="span8">...</div>
</div>
Nesting with fluid grids is a bit different: the number of nested columns doesn't need to match the parent. Instead, your columns are reset at each level because each row takes up 100% of the parent column.
<div class="row-fluid">
<div class="span12">
Level 1 of column
<div class="row-fluid">
<div class="span6">Level 2</div>
<div class="span6">Level 2</div>
</div>
</div>
</div>
The default and simple 940px-wide, centered layout for just about any website or page provided by a single <div class="container">.
<body>
<div class="container">
...
</div>
</body>
<div class="container-fluid"> gives flexible page structure, min- and max-widths, and a left-hand sidebar. It's great for apps and docs.
<div class="container-fluid">
<div class="row-fluid">
<div class="span2">
<!--Sidebar content-->
</div>
<div class="span10">
<!--Body content-->
</div>
</div>
</div>
Media queries allow for custom CSS based on a number of conditions—ratios, widths, display type, etc—but usually focuses around min-width and max-width.
一个电商老板喝醉后，在微博上大骂毕胜，因为员工看了毕胜的演讲视频，第二天辞职了。但如果观察拉卡拉2016年1—9月的数据，得到的结论与拉卡拉自己的结论并不相同。
摘要：2002年，刘晓东发现用伏特加、威士忌、白兰地等洋酒和果汁调配、灌装生产、成本约为3元的预调鸡尾酒是一个比香精更赚钱的行业，于是诞生了RIO，接踵而来的却是巨大的危机。关键点在于产品对消费者的吸引力，以及如何让消费者感受到供不应求的紧迫感。
| Label | Layout width | Column width | Gutter width |
|---|---|---|---|
| Smartphones | 480px and below | Fluid columns, no fixed widths | |
| Smartphones to tablets | 767px and below | Fluid columns, no fixed widths | |
| Portrait tablets | 768px and above | 42px | 20px |
| Default | 980px and up | 60px | 20px |
| Large display | 1200px and up | 70px | 30px |
在niconico上日渐流行起来的亚文化很快被二次元爱好者们带进国内：除了搬运视频，国内的用户也尝试着翻唱歌曲和翻跳舞蹈，并且使用软件开始自己创作歌曲和动画。
<meta name="viewport" content="width=device-width, initial-scale=1.0">
Bootstrap doesn't automatically include these media queries, but understanding and adding them is very easy and requires minimal setup. You have a few options for including the responsive features of Bootstrap:
Why not just include it? Truth be told, not everything needs to be responsive. Instead of encouraging developers to remove this feature, we figure it best to enable it.
/* Landscape phones and down */
@media (max-width: 480px) { ... }
/* Landscape phone to portrait tablet */
@media (max-width: 767px) { ... }
/* Portrait tablet to landscape and desktop */
@media (min-width: 768px) and (max-width: 979px) { ... }
/* Large desktop */
@media (min-width: 1200px) { ... }
For faster mobile-friendly development, use these basic utility classes for showing and hiding content by device.
我不走低价，坚决不做假货 我不走低价位，坚决不做假货，共用一线品牌的面料，卖亲民的价格，做设计师品牌是我的梦想，只是误入平台，亏了这么多钱，如今求生不得求死不能。 到了2012年，连唐岩在网易的上司，级别仅次于丁磊和CFO蔡安活的李甬也选择投入创业的怀抱。
发现没有，最健康的月收入和幸福感最高的月收入是重合的? 同时，随着受教育程度的增高，健康指数先上升后下降，大专学历的人健康状况最好。真正给RIO带来挑战的是那些没有名的小企业，这些企业一般被称为“字母哥”，因为它们只想跟风捞一把，连品牌名都懒得起，随便拼凑几个字母，产品更是粗制滥造，用三精一水随便一调就推向市场。
使其能在重大事件中发挥关键作用，能够在错误舆论趋势下扮演正确舆论的引导、斧正角色，成为了新一代年轻人的三观风向标和在碎片化阅读的当下最快获得优质内容的首选平台，以内容赋力众生。 为什么会这样?因为烧钱没有任何技术含量，也不存在门槛，谁不会花钱啊，对吧?特别是大家都知道中国目前货币超发，热钱很多，所以一定会有别的资本进来与你竞争。
| Class | Phones 480px and below | Tablets 767px and below | Desktops 768px and above |
|---|---|---|---|
.visible-phone |
Visible | Hidden | Hidden |
.visible-tablet |
Hidden | Visible | Hidden |
.visible-desktop |
Hidden | Hidden | Visible |
.hidden-phone |
Hidden | Visible | Visible |
.hidden-tablet |
Visible | Hidden | Visible |
.hidden-desktop |
Visible | Visible | Hidden |